../ dmsp_15_ephemeris_20180928.txt 22-Jun-2023 00:38 109585 dmsp_16_ephemeris_20180928.txt 22-Jun-2023 00:38 109565 dmsp_17_ephemeris_20180928.txt 22-Jun-2023 00:38 109630 dmsp_18_ephemeris_20180928.txt 22-Jun-2023 00:38 109558